Complicated model

[pilou]

WHY not?
See works by Bartels

Make your form as "flat" then extrude it or better lattice-izer by TIG
Then use Fredo Scale tool for deform it!
Of course take a more big thickness than mine in the parameters of the lattice-izer
If you want you bubble soap face, just make an intersection pan with the Lattice-izer result
and give a tranparent material to the external faces

Click image if scroolbarr